Olay Definity Deep Penetrating Anti Ageing Foaming Moisture. Olay Definity Deep Penetrating Anti-Ageing Foaming Moisturiser For luminous, more flawless looking skin with an essential glucosamine-complex. Use once or twice daily. Smooth over entirely cleansed face and neck, paying attention to any areas where discolourations and dullness may occur. As with all facial care products, avoid getting into your eyes.